RDMA/ocrdma: Debugfs enhancments for ocrdma driver

1. Add statistics counters for error cqes.
2. Add file ("reset_stats") to reset rdma stats in Debugfs.

Signed-off-by: Selvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: Mitesh Ahuja <mitesh.ahuja@emulex.com>
Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
index 037893a..47999bb 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
@@ -734,6 +734,9 @@
 		break;
 	}
 
+	if (type < OCRDMA_MAX_ASYNC_ERRORS)
+		atomic_inc(&dev->async_err_stats[type]);
+
 	if (qp_event) {
 		if (qp->ibqp.event_handler)
 			qp->ibqp.event_handler(&ib_evt, qp->ibqp.qp_context);